Pulsator for suction milking machines



April 23, 1929. LL 1,710,089

PULSATOR FOR SUCTION MILKING MACHINES Filed Sept. 9, 192a i 2; 7 26 25 25 2' 7- g1. 20' j I inventor; -2 5 W11 Car! /is Nisan l ct cated Apr. 23, 1929.

units sr TEs rAr QFFICE.

or nonnnorino, swnnnmn co:

Application filed September 9, 1926, Serial No. 13% 357, and in. Bweden September 18, 1825.

chambers which surroimdthe teat spaces proper in the cups ol the machine, and in which a discontuiuous suction is to be prochiced alternately in communication with he outside air anl witha suction conduit, said rotary slide being: made as a plane slide 11 such manner thatits passages open in a surface of the slide. The invention principally in that the oscillating y slide hears with said plane surface est a plane surface on a stationary part pulsator in which surface the passages lea line; to the teat cup chambers and to the 'on conduit open, and that the said stal. uiary part is formed as a ring through which extend a pin provided on the sli re hy means of w ieh pin the required rotational movement is n nitted to the slide from the recipromiting PlSLOIl pistons. By this an re igenient the advantage is attained that the i ll slide becomes protected as faras possible met the influence oil. obliquely directed :i'orces, so that it will he uniformly worn and that during the use of the machine the slide will work itself tighter and tighter against its in this manner the packing becomes better and better, and the milking machine will work reliably and to full ellidonealso utter a long use. T his advantage is o pin'ticulai."importance in respect of out ying machines since such machines are as on in his where the ffiacilites f of repair part entails a considerable dcl n the accompanying drawing a suitable embodiment of the invention is illustrated by way of example. Fig. 1 shows a pulsator according to the inven ion viewed from the side and partly in section on the line I-I in Fig. 2. Fig, 2 shows the same pulsator viewed from above and partly in section on the line llll in Fig. 1, and Fig.3 also shows a section through the slide on the line llll in Fig. 1, but with the slide in the opposite position to that shown in Fig. 2.

ln the embodiment illustrated, a portion of the casing of the pulsator is formed in the usual manner as a cylinder 1 in which two pistons 2 secured to a common piston rod 3, are reciprocahle. Two conduits 4 and 5 extend along the upper side of the cylinder and lead to the two ends oi the cylinder 1, choke screws 6 and 7. respectively, being inserted in said conduits by the aid o'l which screws the speed of movement of the pistons may be controlled. To the piston rod 3 two abutin'ents 8 and 9 are secured at a distance from one another. The outer end of an arm 10 projects in between said ahutments, said arm heing' secured to a pin 12 rotatably journalled in a stationary portion 11 of the pulsator casing, and being actuated bye coil spring y 18 which is arranged in the usual way in such inanner that it tends to turn the arm 10 to one or the other of its extreme positions as soon as, owing: to the movement of the pistons, said arm has been moved past its middle position perpendicular to the piston rod 3. The pin 12 is provided at its upper end with two projecting arms 1% which play in cut-outs 15 in a rotatable sleeve loprovided with a central pin 17 projecting upwards into a ring 18 which is rigidly mounted in the pulsator casing. lVi-th said ring cooperates the rotatable plane slide 19 whicn is provided with central square pin 20 which projects downwards into a hearing sleeve 21 mounted in the ring; 18, and-engages a corresponding cut-out in. the pin 17 in such manner that the slide 19 will always be entrained upon rotation of the sleeve 16 in one direction or the other. The rotational movement or the sleeve 16 and thus also of the slide 19 is limited hytwo stops on the member 11, not illustrated in the drawing. A. cup 22 is provided above the slide 19 and is retained in position by means of a spring capable of being turned said cap being orovided with a number of apertures 2% through which the outside air has lower face of the slide, which face hears against the plane upper face of the station ary rino' 19. and also two passages 27 and 28 YVlllCllQ/xlfilldfill'itlgllh through the slide from liS upper side to its lower face. The two first mentioned passages and 28 are adapt ed to cooperate with an angular passage 29 in the stationary ring 18 which passage is in r of the four teat cupsot the machine.

communication,through a passage 30 in the pulsator casing, with a nipple 31 adapted to be connected through a hose or the like with the conduit to the vacuum pump driving-the machine, and also with two other angular )assages 32 and 33 in the stationary ring 18. Said two last-mentioned passages are in communication with the conduits i and :5, respectively, leading to the ends of the cylinder 1, and also with o nipples s and 85, respectively, which are put in communication through hose or the like with those suction and pressure chambers in the teat cups of the machine in which a discontinuous suction is to be produced. Finally, the two air passages 27 and 28 in the rotary plane slide also cooperate with the passages 32 and in the ring 18.

In the positions of t is Various parts illustrated in Fig. 2 the suction through the passages 30, 29, 26 and33 acts through the conduit 5 in theupper, end the cylinder 1 nd v also through the nipple 35 in t 1e above-mentioned suction and pressure chambe s in two Simultaneously the suction andpressure chambers in the two other teat cups as well as the lower end of the cylinder 1, are in coininuni cation with the outside air through the passages 32 and 27 and the apertures er in the cap Owing to the suction in the upper end of the cylinder 1 the pistons 2 begin to move upwards in Fig. 2 the arm 10 being entrained by the abutment 8 on the piston rod 3. hen the arm 10 has beei turned in this manner so far upwards that itha's passed the above-mentioned middle position, it will be rapidly turned by the spring 13' to its opposite extreme posit-ion, that is to say, it will come to bear against the abutment 9. During this last mentioned rotation the sleeve 16 is entrained by the arms 1%. and thus also the slide 19, so that said slide is moved over to the position illustrated in Fig. 3. In this position of the slide the suction through the passages 30, 29, 25, and through the conduit 4 in the lower end of the c linder i, and also through the nipple 3% in those suction and pressurechambers in the teat cups which were previously in communication with the outside air whereas those suction and pressurechambers in the teat cups in which therewas previously suction, as well as the upper end of the cylinder 1 are now in communication with the outside air tnrough the passages 33 and 28. As a result the pistons 2 again begin to move downwards so that the slide 19 is moved back to the position shown in Fig. 2, and so forth. Since during these rotational movements the slide 19 always bears with its plane lower face against and moreorer, ince by the pin l .liably' and to full 1 the lrinciple 01 r plane through said annular the plane upper face of the statioi any ring 18, against which i; main Ins-d hearing by the air pressure iiiltll'l. on its upper side, lids is well guided bearing sleeve 521, through rotational which pin the transmitted to the slid protected from being dire ted forces, said sl the bearing i will {Y L-cdually bcconic i in this manner the n'uslide has become after been used ror some time.

lustrated in the drawin ed as an exampl Q the irention. I claim: 1. In a pulsator chines the coniloi having Jassae es 0 on said s I Q- Spa-Ling 2. In a pulsator for suct onchines the combination of a c slide oscillatable n said having passages on said slide, said ca nular so sui said casing 0 face and ad: sages in said s pin having an edger c ably ]Ol1li'lilll@d in ear with said firstenenti the edged end of said first-mentioned pin said edged endoi said mentioned pin engaging said cut-out in said second pin a leastone piston reciprocable in s V and means transmitting and transforming the reciprocating; monent of said piston into oscillatory movement of said second pin,

CARL ELIS ELLESOZT. 

